Telephone mouthpiece



March 22 1927. 1,622,061

E. SORTELLE ET AL TELEPHONE MOUTHPIECE Filed Feb. 2, 1926 Edna orteie, VTJrnon C. Z 0 r667",

- I am 5 {y I 6mm;

Patented Mar, 22, 1927.

UNITED STATES PATENT OFFICE EDNA SORTELLE AND VERNON C. PORTER, OF NEW YORK, N. Y.

TELEPHONE MOUTHPIECE.

Application filed February 2, 1926. Serial No. 85,453.

Our invention relates to telephone mouth pieces, and particularly to a mouth .piece adapted for use upon telephones, and in other like connections. to gather in the sound waves as a person talks into the mouth piece and to shut out outside noise in intervals in the conversation. A

An object of this invention is to provide a mouth piece which will be normally set for use, and which can be manually adjusted to close out outside noise.

A further object resides in so constructing the parts that the mouth piece is auto-' Figure 1 is a view in section through amouth piece constructed in accordance with our invention. 7 I

Figure 2 is a view in end elevation looking into the mouth piece.

Figure 3' is a transverse sectional view substantially on the line 33 of'ldigure 1.

Figure a is a view similar to Figure 1, showing a modified construction of the mouth piece.

i igure is a sectional view substantially on line 5 5 of Figure 3.

@ur improved mouth piece can be made vuicanized rubber, glass, synthetic compositions such as a phenoiic condensation product, and in fact of any suitable materiai, supporting member 1 is externeiiy screw threaded at 2 adjacent one end, to it the threaded portion provided on the telephone or other instrument :for reception of the mouth piece and at its remaining end, this supporting member has the cover 3 pro vided with a plurality of perforations These perforations are preferably slightly spaced so that soiid spaces are provided therebctween, of a width sii htly greater than thediaineter of the pertorations, and it is also periferable that the perforations or openings be grouped or "formed substantially concentrically around the central. heat ing opening 5. The mouthpiece 6 is of substantially the usual mouth piece form and has the end wall 7 thereof provided with perforations 8 substantially corresponding with the size and location of the perforations 3. This inner wall 7 is provided with a central bearing opening 9 which registers with opening 5. i

The mouth piece 6 has a groove 10 formed on its inner end concentrically around the bearing opening 9 and the supporting member 1 is provided with a rib 11 to fit within this groove and establish a substantially tight joint between the supporting member and the mouth piece. A rivet or bolt 12 is fitted through the bearing openings 5 and 9, and a coil spring 13 is preferably mounted on this rivet or bolt with one end bearing against the inner head or nut of the rivet or bolt and the remaining end bearing against the wall 3. p

With the parts constructed and mounted in the manner set forth, the mouth piece can be adjusted with respect to the supporting member to bring the openings 4: and Sinto registry so that the mouth piece will be open in substantially the same manner as an ordinary telephone mouth piece, or the mouthpiece 6 can be slightlyitwisted or turned to ring the solid intermediate portions of the one member over'the adjacent ends of the openings or perforations of the other memher. To insure that the mouth piece member normally will be held in a position with the perforations or openings thereof in registry with the perforations or openings of the supporting member we provide one or more springs 14-. These coii springs are mounted in the curved grooves 15 and 16 in the mouth piece and support, which grooves are substantially semi-circular in cross secion to thus provide for reception of substantiaiiy one belt of the coii spring by the groove each. member. The. grooves i5 and 16 have their ends squaredand the groo es are preferably so formed that the squared ends are in aiinement when the openings or perforations a and 8 are in registry way, the springs 14 wiii serv to "normally resiliently urge the movable mouth piece member 6 to a position in which the perforations register and abutment of the ends of the spring 1 2 against the ends of grooves 15 and 16 will stop movement at such a oint that accurate registry of the perforations is insured,

- mouthpiece Under some circumstances and conditions it may be found advisable to provide positive stop means to limit turning movement of the 6 to theclosed position and this can be accomplished by providing the curved slot 17 in one of the members and mounting a pin 18 on the remaining member to work within the slot. Under some conditions it may be found practicable to make the spring 14 of such length that when compressed to its fullest extent it will eii'ectively stop further. rotative movement of the mouthpiece 6 at such a. point that the openings or perforations are efiec'tively closed.

As illustrated in Figure 4, the mouthpiece and the supporting members are each provided with the registering grooves 18 and 19 and a gasket or washer BO-is inserted within this groove. 'VVith this construction the main bearing between the two members will be upon the ring washer or gasket, and frictional engagement between'the wall or ends 3 and 7 will be relieved. However, with some materials, and in some connections, it may be found advisable or desirable to insert a thin layer of felt or other suitable material, as indicated at 21, to prevent rasping or grating sounds as the mouthpiece is turned. In most instances, any

objectionable frictional contact and consequent'noisc can be reduced by coating lightly with graphite or other lubricant between the two on s.

While we have herein shown and described only certain specific embodiments of our'invention and have suggested only certain possible modifications, it will be appre ciated that changes and variations can be made in the "form, construction and arrange ment of the parts without departing from the spirit. and scope of our invention.

We claim:

1. A telephone mouth piece comprising a supporting member having perforations therethrough, a mouth piece revolubly mounted on the supporting member and provided with perforations to be brought lnto and out of registry with the perforations of the supporting member as the mouth piece is turned, and a spring normally resiliently urging the mouth piece to a position in which the perforations register.

2. A telephone mouth piece comprising a supporting member having perforations therethrough, a. mouth piece revolubly mounted on'said supporting member and the perforations of the supporting member.

3. A tale hone mouth iece com arisin a supporting member having perforations v therethrough, a mouth piece having a closed end provided with perforations, a pin revolubly mounting the mouth piece upon the supporting member with the perforations oi-the closed end adjacent the perforations of the supporting member, a spring resiliently drawing the two members together, and a spring normally resiliently urging the mouth piece to a position with the perforations in registry.

4. A telephone mouth piece comprising a. supporting member having perforations therethrough, a mouth iece having-a closed end provided with periorations, a pin revolubly mounting the mouth piece upon the supporting member with the perforations of the closed end adjacent the perforations of the supporting member, a spring resiliently drawing the two members together, a spring normally resiliently urging the mouth piece to a position with the perforations in registry, and means to stop revoluble movement of the mouthpiece with the perforations thereof out of registry with the perforations of the supporting member.

5. A telephone mouth piece comprising a supporting member having perforations therethrough, a mouth piece having a closed end rovided with perforations, a pin revolub y mounting the mouth piece upon the supporting member with the perforations of the closed end adjacent the perforations-of the supporting member, a spring resiliently drawing the two members together, a spring normally resiliently urging the mouth piece to a position with the perforations in registry, means to sto revoluble movement of the mouth piece with the erforations there of out of registry with the perforations of the supporting member and a packing between the two members;

In testimony whereof We aiiix our signatures.

EDNA SURTELLE. VERNON (3. PORTER. 

